The Physics Society of IranIranian Journal of Physics Research1682-69576120191126The effect of sintering temperature on the intergranular properties and weak link behavior of Bi2223 superconductorsThe effect of sintering temperature on the intergranular properties and weak link behavior of Bi2223 superconductors17509FAP. Kameli0000-0003-4490-0767H. SalamatiM. EslamiM. A. KhatibiJournal Article20191126 A systematic study of the intergranular properties of (Bi,Pb)2 Sr2 Ca2 Cu3 Oy (Bi2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques. In this study, we have prepared a series of Bi2223 samples with different sintering temperatures. The XRD results show that by increasing the sintering temperature up to 865° c , the Bi2212 phase fraction decreases. It was found that the Bi2212 phase on the grain boundaries is likely to play the role of the weak links and consequently reduces the intergranular critical current densities. A systematic study of the intergranular properties of (Bi,Pb)2 Sr2 Ca2 Cu3 Oy (Bi2223) polycrystalline samples has been done using the electrical resistivity and AC susceptibility techniques. In this study, we have prepared a series of Bi2223 samples with different sintering temperatures. The XRD results show that by increasing the sintering temperature up to 865° c , the Bi2212 phase fraction decreases. It was found that the Bi2212 phase on the grain boundaries is likely to play the role of the weak links and consequently reduces the intergranular critical current densities.https://ijpr.iut.ac.ir/article_509_e2230b853516e7b05d79744fbd4c9c13.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Electron localization and metal-insulator transition in the one-dimensional chian of atomsElectron localization and metal-insulator transition in the one-dimensional chian of atoms913510FAA. EsmailpourM. EsmaeilzadehJournal Article20191126 In this paper, the electron localization length was calculated numerically in a one-dimensional chain of atoms with random binary alloy. It is shown that in a one-dimensional finite-size chian of atoms, the localization length of the electron wave function decreases with increasing impurity concentration and with more increasing of the impurity concentration, the localization length becomes smaller than the system size and therefore insulator-metal transition occurs. In this paper, the electron localization length was calculated numerically in a one-dimensional chain of atoms with random binary alloy. It is shown that in a one-dimensional finite-size chian of atoms, the localization length of the electron wave function decreases with increasing impurity concentration and with more increasing of the impurity concentration, the localization length becomes smaller than the system size and therefore insulator-metal transition occurs.https://ijpr.iut.ac.ir/article_510_087408522c31eeb1f982bc0eaf81d35f.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Cross-section for & gamma e & rarr e & nu& nu& oline and & gamma& gamma& rarr& nu& nu& oline inelastic acatteringCross-section for & gamma e & rarr e & nu& nu& oline and & gamma& gamma& rarr& nu& nu& oline inelastic acattering1526511FAM.ZeinaliM.HaghighatJournal Article20191126 We study processes in which neutrinos can be generated as a possible source for the neutrion emission form neutron stars. In the high energy limit and in the range em< E< Mw the cross sention for ye→evv is analytically calculated. We also calculate the cross section for yy→vv in the noncommutative space. The obtained results in comparison with the cross section for yy→vv and yy→ yvv in the commutative space could be quite important in the astrophysics. As a result the cross section for yy→ vv in the noncommutative spaces, in the range =100-300Gev , is comparable with its counterpart in the commutative space. We study processes in which neutrinos can be generated as a possible source for the neutrion emission form neutron stars. In the high energy limit and in the range em< E< Mw the cross sention for ye→evv is analytically calculated. We also calculate the cross section for yy→vv in the noncommutative space. The obtained results in comparison with the cross section for yy→vv and yy→ yvv in the commutative space could be quite important in the astrophysics. As a result the cross section for yy→ vv in the noncommutative spaces, in the range =100-300Gev , is comparable with its counterpart in the commutative space.https://ijpr.iut.ac.ir/article_511_a760880003e7ddedfef56acb3b09697f.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Dependent of electrical resistivity of thin wire on magnetic field and temperatureDependent of electrical resistivity of thin wire on magnetic field and temperature2732512FAE. SadeghiM. ZareJournal Article20191126 Variation of electrical resistivity of Bismuth nanowire versus magnetic field the and temperature are considered. We study the size effect and surface scattering of the carrier in thin wire for systems with ellipsoidal fermi surfaces. Results are in good agreement with experimental points. Variation of electrical resistivity of Bismuth nanowire versus magnetic field the and temperature are considered. We study the size effect and surface scattering of the carrier in thin wire for systems with ellipsoidal fermi surfaces. Results are in good agreement with experimental points.https://ijpr.iut.ac.ir/article_512_10a7cdd970fe135cf4f7bb55c0e3b59f.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Contribution of CSB interactions in binding energy difference of mirror nucleiContribution of CSB interactions in binding energy difference of mirror nuclei3338513FAM. AsghariJournal Article20191126 Nolen-Schiffer Anomaly in mirror nuclei due to the NN interactions with isospin mixing between T=0 and T=1 mesons of the same spin and parity are investigated. With the computation of coulomb energy along with the charge symmetry breaking (CSB) effects provide a reasonably accurate description of binding energy differences between 39ca- 39k- , 41cs- 41ca mirror nuclei. Nolen-Schiffer Anomaly in mirror nuclei due to the NN interactions with isospin mixing between T=0 and T=1 mesons of the same spin and parity are investigated. With the computation of coulomb energy along with the charge symmetry breaking (CSB) effects provide a reasonably accurate description of binding energy differences between 39ca- 39k- , 41cs- 41ca mirror nuclei. https://ijpr.iut.ac.ir/article_513_3dc4876f3f08201c7c76cb71fa1da439.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Response of Landau energy levels to the change of magnetic flux in non-isotropic impuritiesResponse of Landau energy levels to the change of magnetic flux in non-isotropic impurities39441514FAS. Ramezani SaniA. Morteza AliM. R. SarkardeiJournal Article20191126 We have studied a practical approach for the inclusion of non-isotropic impurities in the systems showing integer quantum Hall effect. We observe that if the impurity distribution in the direction which the electric field applys, then the localized levels goes out from the origin with respect to the isotropic case, and the Hall step will the clearly observed. We have studied a practical approach for the inclusion of non-isotropic impurities in the systems showing integer quantum Hall effect. We observe that if the impurity distribution in the direction which the electric field applys, then the localized levels goes out from the origin with respect to the isotropic case, and the Hall step will the clearly observed.https://ijpr.iut.ac.ir/article_514_59b90e1005a220e2ebc542eb9d950b1e.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126The Klein-Gordon and the Dirac oscillators in a non-commutative space and in a constant magnetic fieldThe Klein-Gordon and the Dirac oscillators in a non-commutative space and in a constant magnetic field4548515FAB. MirzaR. NarimaniA. SadeghiT. AmeriJournal Article20191126 In this paper the Klein-Gordon and the Dirac Oscillators in a non-commutative space and in a constant magnetic field are investigated. It is shown that for a specific value of the magnetic field, one may map these oscillators from a non-commutative space to a commutative space. In this paper the Klein-Gordon and the Dirac Oscillators in a non-commutative space and in a constant magnetic field are investigated. It is shown that for a specific value of the magnetic field, one may map these oscillators from a non-commutative space to a commutative space.https://ijpr.iut.ac.ir/article_515_2b8a61594b1f4c4db0902a8a395ced93.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126The effect of temperature and atmosphere on spinel phase formation of nano-manganese ferriteThe effect of temperature and atmosphere on spinel phase formation of nano-manganese ferrite4952516FAB. NasrJ. AmighianM. MozaffarJournal Article20191126 Phase formation of manganese ferrite prepared by co-precipitation method is studied at different annealing temperatures. It is shown that the spinel phase is formed by quenching only in inert gas. XRD patterns show that the background picks fall in intensity by increasing annealing temperature and the single phase is achieved by magnetic separation. Phase formation of manganese ferrite prepared by co-precipitation method is studied at different annealing temperatures. It is shown that the spinel phase is formed by quenching only in inert gas. XRD patterns show that the background picks fall in intensity by increasing annealing temperature and the single phase is achieved by magnetic separation.https://ijpr.iut.ac.ir/article_516_f3f27a324736617f20abbf2ffd806f6d.pdfThe Physics Society of IranIranian Journal of Physics Research1682-69576120191126Growth of Cd0.96Zn0.04Te single crystals by vapor phase gas transport methodGrowth of Cd0.96Zn0.04Te single crystals by vapor phase gas transport method5353517FAS. H.Tabatabai YazdiM. R.AlinejadN.TajaborJournal Article20191126 Cd0.96Zn0.04Te crystals were grown using vapor phase gas transport method (VPGT). The results show that dendritic crystals with grain size up to 3.5 mm can be grown with this technique. X-ray diffraction and Laue back-reflection patterns show that dendritic crystals are single-phase, whose single crystal grains are randomly oriented with respect to the gas-transport axis. Electrical measurements, carried out using Van der Pauw method, show that the as-grown crystals have resistivity of about 104 Ω cm and n-type conductivity. Cd0.96Zn0.04Te crystals were grown using vapor phase gas transport method (VPGT). The results show that dendritic crystals with grain size up to 3.5 mm can be grown with this technique. X-ray diffraction and Laue back-reflection patterns show that dendritic crystals are single-phase, whose single crystal grains are randomly oriented with respect to the gas-transport axis. Electrical measurements, carried out using Van der Pauw method, show that the as-grown crystals have resistivity of about 104 Ω cm and n-type conductivity.https://ijpr.iut.ac.ir/article_517_38913e1d6a7b94cb0f55994f679f5956.pdf